Latent heat storage member and building material provided with same, microcapsules and thermal storage material using microcapsules

Abstract

The present invention is to provide a latent heat storage member which is able to more reliably contribute to a daily peak shift of energy consumption, and a building material provided with the latent heat storage member. A latent heat storage member 20 which is formed by using a material including a latent heat storage material such as paraffin and a gelation agent and is used as a building material, includes an outer side surface 20 b arranged on a solar light irradiation side facing the outside, and has a phase change temperature T 1 within a temperature range between a lowest temperature Tsmin and a highest temperature Tsmax of the outer side surface 20 b in the daytime.

The invention claimed is: 
     
       1. A microcapsule, comprising:
 a thermal storage substance which is subjected to a phase change at a predetermined phase change temperature; 
 a wall substance including the thermal storage substance; and 
 a slide-ring molecule introduced into the wall substance. 
 
     
     
       2. The microcapsule according to  claim 1 ,
 wherein the slide-ring molecule includes a linear molecule, cyclic molecules performing clathration with respect to the linear molecule, and blocking groups arranged on both terminals of the linear molecule. 
 
     
     
       3. The microcapsule according to  claim 2 ,
 wherein the slide-ring molecule is a polyrotaxane. 
 
     
     
       4. The microcapsule according to  claim 2 ,
 wherein the wall substance is configured of a polyurea or a polyurethane. 
 
     
     
       5. The microcapsule according to  claim 2 ,
 wherein the linear molecule is a polyethylene glycol or a polycaprolactone. 
 
     
     
       6. The microcapsule according to  claim 2 ,
 wherein the cyclic molecule is at least one cyclodextrin selected from α-cyclodextrin, β-cyclodextrin, and γ-cyclodextrin. 
 
     
     
       7. The microcapsule according to  claim 2 ,
 wherein the cyclic molecule is connected to a polymer chain configuring the wall substance by a urea bond or a urethane bond. 
 
     
     
       8. The microcapsule according to  claim 2 ,
 wherein the cyclic molecule includes a hydroxyl group or an amine group. 
 
     
     
       9. The microcapsule according to  claim 1 ,
 wherein as the thermal storage substance, an organic material or an inorganic material is used. 
 
     
     
       10. A thermal storage material, comprising:
 a container; 
 an aqueous inorganic salt solution filled into the container; and 
 a microcapsule dispersed in the aqueous inorganic salt solution, the microcapsule comprising:
 a thermal storage substance which is subjected to a phase change at a predetermined phase change temperature; 
 a wall substance including the thermal storage substance; and 
 a slide-ring molecule introduced into the wall substance.